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63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
#ifndef Py_BITSET_H
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#define Py_BITSET_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Bitset interface */
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#define BYTE char
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typedef BYTE *bitset;
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bitset newbitset Py_PROTO((int nbits));
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void delbitset Py_PROTO((bitset bs));
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#define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0)
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int addbit Py_PROTO((bitset bs, int ibit)); /* Returns 0 if already set */
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int samebitset Py_PROTO((bitset bs1, bitset bs2, int nbits));
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void mergebitset Py_PROTO((bitset bs1, bitset bs2, int nbits));
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#define BITSPERBYTE (8*sizeof(BYTE))
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#define NBYTES(nbits) (((nbits) + BITSPERBYTE - 1) / BITSPERBYTE)
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#define BIT2BYTE(ibit) ((ibit) / BITSPERBYTE)
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#define BIT2SHIFT(ibit) ((ibit) % BITSPERBYTE)
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#define BIT2MASK(ibit) (1 << BIT2SHIFT(ibit))
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#define BYTE2BIT(ibyte) ((ibyte) * BITSPERBYTE)
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_BITSET_H */
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